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| -rw-r--r-- | info/blueshift.texinfo | 37 | ||||
| -rw-r--r-- | src/solar.py | 43 |
2 files changed, 80 insertions, 0 deletions
diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo index 1b9a344..b61d28e 100644 --- a/info/blueshift.texinfo +++ b/info/blueshift.texinfo @@ -900,6 +900,43 @@ time in Julian Centuries. All parameters are floating point and may not be @code{None}, except for in @code{solar_elevation}, as specified. +Blueshift provides constants with important elevations of +the Sun during twilight. + +@table @code +@item SOLAR_ELEVATION_SUNSET_SUNRISE +The Sun's elevation at sunset and sunrise, +measured in degrees. + +@item SOLAR_ELEVATION_CIVIL_DUSK_DAWN +The Sun's elevation at civil dusk and civil dawn, +measured in degrees. + +@item SOLAR_ELEVATION_NAUTICAL_DUSK_DAWN +The Sun's elevation at nautical dusk and nautical +dawn, measured in degrees. + +@item SOLAR_ELEVATION_ASTRONOMICAL_DUSK_DAWN +The Sun's elevation at astronomical dusk and +astronomical dawn, measured in degrees. + +@item SOLAR_ELEVATION_RANGE_TWILIGHT +The Sun's lowest and highest elevation during all +periods of twilight, measured in degrees. + +@item SOLAR_ELEVATION_RANGE_CIVIL_TWILIGHT +The Sun's lowest and highest elevation during +civil twilight, measured in degrees. + +@item SOLAR_ELEVATION_RANGE_NAUTICAL_TWILIGHT +The Sun's lowest and highest elevation during +nautical twilight, measured in degrees. + +@item SOLAR_ELEVATION_RANGE_ASTRONOMICAL_TWILIGHT +The Sun's lowest and highest elevation during +astronomical twilight, measured in degrees. +@end table + @node Terminology diff --git a/src/solar.py b/src/solar.py index 6790c3e..8c79d79 100644 --- a/src/solar.py +++ b/src/solar.py @@ -18,6 +18,49 @@ import math import time + +SOLAR_ELEVATION_SUNSET_SUNRISE = 0.0 +''' +:float The Sun's elevation at sunset and sunrise, measured in degrees +''' + +SOLAR_ELEVATION_CIVIL_DUSK_DAWN = -6.0 +''' +:float The Sun's elevation at civil dusk and civil dawn, measured in degrees +''' + +SOLAR_ELEVATION_NAUTICAL_DUSK_DAWN = -12.0 +''' +:float The Sun's elevation at nautical dusk and nautical dawn, measured in degrees +''' + +SOLAR_ELEVATION_ASTRONOMICAL_DUSK_DAWN = -18.0 +''' +:float The Sun's elevation at astronomical dusk and astronomical dawn, measured in degrees +''' + +SOLAR_ELEVATION_RANGE_TWILIGHT = (-18.0, 0.0) +''' +:(float, float) The Sun's lowest and highest elevation during all periods of twilight, measured in degrees +''' + +SOLAR_ELEVATION_RANGE_CIVIL_TWILIGHT = (-6.0, 0.0) +''' +:(float, float) The Sun's lowest and highest elevation during civil twilight, measured in degrees +''' + +SOLAR_ELEVATION_RANGE_NAUTICAL_TWILIGHT = (-12.0, -6.0) +''' +:(float, float) The Sun's lowest and highest elevation during nautical twilight, measured in degrees +''' + +SOLAR_ELEVATION_RANGE_ASTRONOMICAL_TWILIGHT = (-18.0, -12.0) +''' +:(float, float) The Sun's lowest and highest elevation during astronomical twilight, measured in degrees +''' + + + def sun(latitude, longitude, t = None, low = -6.0, high = 3.0): ''' Get the visibility of the Sun |